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(Hommel.) N. L. BRADLEY, P. R. SBIDENSTIGK'ER & A. H. JONES.

Extension Lamp Fixture.

No. 241,917. Patented May 24,1881'.

ffflzeffpq UNITED STATES PATENT OFFICE.

NATHANIEL L. BRADLEY, F. ROBERT SEIDEN STICKER, AND AUGUSTUS H.

JONES, OF MERIDEN, CONNECTICUT, ASSIGNORS TO THE BRADLEY &

HUBBARD MANUFACTURING COMPANY, OF SAME PLACE.

EXTENSION LAM P-FIXTURE.

SPECIFIGATIGN forming part of Letters Patent No. 241,917, dated May 24, 1881.

Application filed February 23, 1881. (No model.)

To all whom it may concern Be it known that. we, NATHANIEL L. BRAD- LEY, F. ROBERT SEIDENs'rIcKEE, and AU- GUSTUS H. JONES, of Meriden, in the county of New Haven and State of Connecticut, have invented a new Ilnprovement in Extension Lamp-Fixtures; and we do hereby declare the following, when taken in connection with the accompanying drawing, and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawing constitutes part of this specification, and represents a sectional side view.

This invention relates to an improvement in that class of lamp-fixtures which are designed to be suspended from the ceilin g, and so that the lamp may be drawn down to stand at different elevations,commonly called extension lamp-fixtures,77 and particularly to that class in which the shade is supported on the lampsupporting part of the fixture, so as at all times to stand in the same relation to the lamp; the object being to apply a frictional device operating against the downward movement of the lamp, but relieved of such friction when the lamp is raised; and also to arrange a smokebell to move up and down with the lamp, so that it may always retain the same relative position to the lamp; and the invention consists in the construction, as hereinafter described, and particularly recited in the claims.

A represents the frame on which the lamp Vis supported, commonly called the harp.7 It

is provided with a seat, B, at the center for the lamp-forint, and with seats C C to support the shade D. The sides of .the frame extend up through and above the shade, through the weight Gr, and come together, as at E, a distance above the shade sufficient for the support of the smoke-bell in a proper relative position to the lamp, F representing the smokebell suspended from the connection E between the sides of the frame.

G represents the counterbalanci11g-weight, inring shape, above the shade, so as to permit the frame and smoke-bell to move up or down through it, and from which chains or cords H extend up over pulleys above, thence down and attached to the lamp-frame, as shown, so that as the lamp is drawn down, as indicated in broken lines, the smoke-bell moves with it and retains always its same relation to the lamp and shade.

As a means for producing friction to operate against the descent of the lamp, the pulleys I are provided with toothed ratchets a. Fixed pawls d are applied to the pulley-supports to engage the teeth ot' the ratchets, as showin the direction of the teeth and action of the pawls being such that the pawls will hold the ratchets and prevent the pulleys turning when the lamp is drawn down. Hence the chains will work over the pulleys while stationary, the friction between the chains and pulleys in such stationary condition aiding materially in resisting the natural descent or counterbalancing the gravity of the lamp. Hence the weight G maybe very much lighter than in fixtures where the pulleys are free to turn in both directions. When the lamp is lifted-as for the purpose of raising it--the pulleys are free to roll without the applied friction, the weight aiding in the ascent of the xture. Another advantage ofthe thus-applied friction is that whereas when the pulleys are free to turn in both directions it is necessary that the weight should nearly counterhalance the fixture, and the adjustment between the weight and fixture is frequently so nice that if the fount be full the fixture will descend of its own gravity, or if the oil be nearly exhausted the fixture will ascend because of the reduced weight, the applied friction, as by this construction, permits a much greater variation between the weight and fixture, and thus overcomes difficulties heretofore existing in this class of fixtures.

We claiml. In an extension lamp-fixture, substantially such as described, the frame or harp, constructed to support the lamp, and with supports C for the lower edge ofthe shade, and

with extensions upward through the shade, and permit them to revolve when thelamp as- 1o said extensions connected above the shade, cends7 substantially as described.

combined With the ring shaped weight G, ,Y 4 n Y through which the extension ofthe frame moves AIrg in I) up and down, substantially as described. X'UUfq HJ JONIS J n' 2. In an extensionlamp-fixture,substantiall)v l k J such as described, the suspension-pnlleys, pro Witnesses:

vided with ratchet and pawl to hold the 1nd- F. J. SEIDENSTICKER,

leys stationary against the descent of the lamp UnAs. E. SHELLEY. 

